428423 has 4 divisors (see below), whose sum is σ = 440040. Its totient is φ = 416808.

The previous prime is 428411. The next prime is 428429. The reversal of 428423 is 324824.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 428423 - 2⁸ = 428167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5753 + ... + 5826.

It is an arithmetic number, because the mean of its divisors is an integer number (110010).

2⁴²⁸⁴²³ is an apocalyptic number.

428423 is a deficient number, since it is larger than the sum of its proper divisors (11617).

428423 is a wasteful number, since it uses less digits than its factorization.

428423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11616.

The product of its digits is 1536, while the sum is 23.

The square root of 428423 is about 654.5402966968. The cubic root of 428423 is about 75.3860392036.

The spelling of 428423 in words is "four hundred twenty-eight thousand, four hundred twenty-three".